A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Our product and our sum always give the same answer. Who are we?

How many triangles can you count in the figure given?

One day Jenifer meets the Lion and the Tiger in the Forest of Forgetfulness. She knows that the Lion lies on Mondays, Tuesdays, and Wednesdays, and tells the truth on the other days of the week. The Tiger, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Jenifer:

Lion: Yesterday was one of my lying days.

Tiger: Yesterday was one of my lying days too.

What day is it?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Remove two matchsticks to make the below equation correct.

Name a key which is hardest to turn.

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C